71 Duster 340 carb issues? Maybe

Hey All,

Looking for some guidance. I have a 71 Duster 340 4speed. The car will run and drive great. But it seems like when I run it for a while it will die and the only way I can get it to start again is to damn near push the pedal constantly to the firewall. The carb is a quick fuel 750 with no choke and vaccum advance. I'm running msd igniton and a MSD distributor. Could it be the accelerator pump lever or something with the carb? Any help is great. Thank you.